Join Eric Wing for an in-depth discussion in this video Working with dimensions, part of Revit MEP 2014 Essential Training.
Although we may not use dimensions much in MEP, it's still prudent to cover the topic. Like text, dimensions are considered annotation. But Revit dimensions are a little bit more than that. We're going to use dimensions as both the means to communicate to the person reading our prints, and as a way to lay out geometry. So to get started, let's make sure we're in Sprinkler, Floor Plans, Callout of 1 - sprinkler. Let's get started. Let's zoom in on this big pipe coming into our building. Suppose we want to tell them what the distance is from here to the inside face of this wall.
On the Annotate tab, click the Aligned Dimension button. On the Options Properties, let's go Wall Faces. Let's scroll down to this wall, and pick it. Notice when we hover over our pipe, it gives us a center line. Go ahead and come up to the center line, and pick it. Bring your cursor over to the side, and pick a point off of it. Then hit Escape a couple times. Not a great dimension. Let's go ahead and type over it. Select the 2 foot 5 dimension. It turns blue. Go ahead and select the text and let's replace with text.
Let's call it call it 2' - 6". Hit OK. Invalid. Revit won't let you do it. To change the dimension value for length or angle of a segment select the element the dimension refers to, then click the value to edit it. So what this means is Revit's not going to let us have an inacurate dimension in our model. That's a good thing. Click to Cancel button, hit Escape a couple times. Now, as they said to change this increment, we need to select the item that's being dimensioned.
Notice now, how this turns blue again. Now, go ahead and click on the text. We get dial up. Now, lets go 2 space 6, and hit Enter. Things are entire pipe up 2'6 off of that wall to the center line. Hit Escape a couple times. Let's add another dimension shall we? This time I wanted to mention these pipes out. On the Annotate tab, click the Aligned dimension. (SOUND) This time I want to click the center line of this pipe, then keep going, click the center line of this pipe.
Then the center line of this pipe, zoom out, and to finish dimension, come outside of the building, and pick a point right about here. With the dimensions still selected, we have a little EQ icon with a red line going through it. Click the icon. It's going to equally space our pipes. Hit escape a couple times. This is how we dimension. On the Annotate panel, click a Dimension drop down. Notice that we can set up different dimension types for all of our different dimensions.
Go ahead and select your dimension that you have in the model. This is a linear dimension. Click on Edit Type. We can change some items. But what's the difference between changing something here and changing it in Edit Type? Hit Cancel, and I'll explain it. If we select any item on our screen, and if we make a change in the Properties dialogue, right here, this change is only going to reflect the item we have selected. This is not just true for dimensions, it's true for any object in Revit.
For example, if we don't want to equally display the text. We're going to put a value in here, and hit Apply. It only changes that dimension. Now if we go to Edit Type, now we can change a bunch of things. We can come down to tick mark, and instead of diagonal one eighth, we can change it to anything we want. We can change it to Arrowfilled 15 degree. Scroll down to Text. Let's set our width factor to be 0.8. Hit Apply, then hit OK. Click off of it.
And change all of our dimension types. Now, let's go up to this dimension. Notice that they're kind of bleeding into one another. Select your dimension string. Notice you have a grip sitting right here. Go ahead and pick it. And bring your text out. Pick this one and bring your text out. Click off of it. Now hit Escape a couple times, notice that we can control how our dimensions look. So, in summary dimensions are used for two different things.
One, to tell the person how to build something, two to actually help you lay your model out.
- Creating floor plans
- Linking to other models
- Adding electrical panels
- Creating a switching circuit
- Adding conduit
- Adding mechanical equipment
- Adding supply and return ducts
- Creating a plumbing view
- Adding fixtures and domestic supply piping
- Adding sprinklers
- Creating and printing sheets
- Controlling revisions